Typewriting machine



E. B. HESS ET AL TYPEWRITING MACHINE Filed Jan, 29, 1.925

Patented Aug. 25, 1925.

UNITED STATES PATENT OFFICE.

EDWARD B. HESS, OF NEW YORK, AND LEWIS C. MYERS, OF FREEPORT, NEW YORK,

ASSIGNORS T0 ROYAL TYPEWRITER COMPANY, INC., 0F NEW YORK, N. Y., A COR- PORATION 0F NEW YORK.

TYPEWRITING MACHINE.

.Application filed January To all whom. t may concern.'

Be it known that we, EDWARD B. Hass, a citizen of the United States, and resident of New York, county of New York and State of New York, and LEwIs C. MYERS, a citizen of the United States, and resident of Freeport, county of Nassau, and State of New York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

Our invention relates to paper feeding devices for typewriting and similar machines and more especially to the mounting and operation of the paper feed rolls and their associated parts.

An object of the invention is to provide means for supporting the paper table, paper apron, front and rear feed rolls and operating parts from two brackets carried by the carriage ball race rail or carriage base, entirely independent of the carriage end plates.

Another object of the invention is to provide means for throwing the feed rolls out of engagement with the platen which means will be simple and eflicient and provide the necessary movement of the feed rolls from a very limited movement of the operating means.

A still further object of the invention is to position the parts in such manner that an extremely compact construction will be produced suitable for use in portable machines although having value in other relations.

Other objects will be apparent from the following detailed description and the appended claims.

In the drawings:

Figure 1 is a top plan view of an embodiment of the invention with the platen removed.

Figure 2 is an end View from the right hand side of the machine with parts in section and parts broken away.

Figure 3 is a section on the line 3 3 of Figure 1.

Figure 4 is a detail view showing the form and position of the roll releasing cams on an enlarged scale.

The invention is sho-wn as applied to the 29, 1925. Serial N0. 5,519.

carriage of the Royal portable machine, but this is merely illustrative, since many of the features of the invention are capable of use in other types o-f machine. There have accordingly been shown certain elements of the machine which are merely typical and in no way limit the invention in its scope.

A carriage ball race member or base A cooperates through balls B with race members C to provide for a travelling movement of the carriage. The base A supports or is integral with end plates D in which is journalled a shaft E carrying the usual platen F. This shaft is provided with a finger wheel Gr by which the platen may be rotated. An escapement mechanism comprises dogs H with which cooperates a rack I pivotally supported from arms K and moved by a finger piece L when it is desired to release the same. An overhead bail member comprises side arms M connected by a shaft N carrying rolls O. These parts may be of any suitable construction without departing from the spirit of the invention.

Near each end of the platen is provided a bracket 1 which is held to the base member A by rivets 2 or in other suitable manner. The two brackets are identical except that the offset arms in one case extend toward `the right and in the other toward the left, and only one bracket will therefore be particularly referred to. From the upwardly and rearwardly extending portion 3 of the bracket 1 an arm 4 projects inwardly and then rearwardly to form a support to which is pivoted a pressure roll supporting arm 5. This arm has a cutout 6 to receive the end of the pressure roll shaft 6 in the usual manner, and a rearwardly extending ear 7 to which is fastened one end of a spring 8. Another arm 9 extends inwardly and then rearwardly from the bracket 1 to form an extension 10` to which the other` end of the spring 8 is attached. As shown, the spring tends to move the arm from the dotted line to the full line position of 'Figure 3 and thus press the feed roll against the platen. In the present case a single rear feed roll 11 is provided which extends the length of the platen.

As illustrated the bracket 1 extends under the platen and at its forward end it has an inwardly projecting portion bent up at right angles to form an ear 12 in which is mounted a stud 13 on which is pivoted a front pressure roll arm 14 in the form of a lever.

The front end of this lever extends upwardly and has an open bearing 15 in which is mounted the end of a shaft 16 on which are the front feed rolls 17, here illustrated as two in number separated by? a space lthrough which passes a tongue of the paper apron for the purpose of guiding the paper to the printing point. A spring 18 is coiled about the stud 13 and bears at one end against the feed roll arm 14, and at its other end against the base member A 1n such manner as to constantly urge the feed rolls 17 against the platen, or to move them from the dotted to the full line position of Figure 3.

The base member A is provided with cutouts 19 and each bracket 1 has a downturned ear 2O on its inner side which forms a bearing for a rock shaft 21. At the right hand side of the machine this shaft is extended through a downturned ear 22 on the right hand end plate D of the carriage. Near each end of the platen there is rigidly mounted on the shaft 21 a cam member 23 having grooves 24 and 25 therein. A portion of each groove is cut away to form a cam, and these cams cooperate with the ends of the rear and front roll supporting arms. The grooves are formed with tapered or bevelled sides as indicated at 25.

The rear roll supporting arm 5 has a downward extension 26 having its end bevelled at 27 (Fig. 3). A cam 28 in the groove 24 cooperates therewith. Similarly the downward extension 29 of the front roll supporting arm 14 cooperates with a cam 30 in the groove 25. As will be readily apparent from Figure 3, when the rod 21 is rotated, the cams 28 and 30 will engage the ends of the extensions 26 and 29 and move the roll supporting arms and rolls from the full to the dotted line positions of Figure' 3. A quarter revolution of the shaft will be sufficient to move the rolls to a oonsiderable distance from the platen. The return movement is brought about by the springs 8 and 18.

The shaft 21 is rotated in the following manner. The end which passes through the right hand side plate of the carriage is pro-A It is to be noted that the upward eXtensions 3 of the brackets 1 also carry by means of fastenings 37 the paper table 38 which is continuous with the paper apron 39 and has cutouts for the passage of. the feed rolls at front and rear. This paper table also has a scale 40 carried thereby or is provided at its rear edge with gradations. In this manner the whole system of paper table, paper lalpron, front and rear feed rolls and their supports, is carried by the two brackets 1. The cam carrying shaft 21 is located below the plane of the base plate A and the extensions of the feed roll arms extend downward through the cutouts 19 in the base A. This affords a very compact construction. The bevelled grooves in the cam members serve to guide the feed roll arms and retain them in proper position and the ear 12 lies along side of the front feed roll arm or lever 14 and acts as a stop against lateral movement in one direction.

The front scale 41 is carried by arms 42 pivoted at 43 to the end plates D of the paper carriage and is pressed against the platen by springs 44 as shown in Figure 2.

It is obvious that a very compact construction has been devised which has been found very efficient. Various detail changes can be made without in any manner dep-arting from the spirit of the invention which is to be regarded as limited only by the scope of the appended claims.

We claim as our invention 1. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets supported by said rail, and a paper table, feed rolls, their returning springs and cam release rod all carried by said brackets.

2. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets supported by said rail and front and rear paper feed mechanism carried as an entirety by said brackets.

3. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of bracketsf supported on the upper surface of said rail, and a paper table, paper apron, front and rear rolls and their returning springs all carried by said brackets.

4. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets supported by said rail, each bracket having an arm extending inwardly and then rearwardly, and a roll supporting arm pivoted in said first named arm.

5. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets sup-ported by said rail, each bracket having a rearwardly extending arm, a roll supporting arm pivoted in the first named arm, and a single rear feed i ll lili XC il tl roll extending substantially the lengthof mg arm.

6. P-aper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets supported on the upper surface of said rail, each bracket having a rearwardly extending arm, a roll supporting arm pivoted to the first named arm, and a spring connected at one end to the roll supporting arm and at its other end to the bracket.

7. Paper feed mechanism for typewriting machines, comprising a carriage rail, a pair of brackets supported on said rail, each bracket having a rearwardly extending arm, a roll supporting arm pivoted near its end to the first named arm, the free end of the roll supporting arm extending downwardly through the rail, and cam release means engaging said free end.

8. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets suppo-rted on said rail, each bracket having a forwardly extending arm, a stud carried thereby, and a front roll supporting arm pivoted on said stud and sustained aga-inst lateral movement by the bracket arm.

9. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets supported o-n said rail, each bracket having a forwardly extending arm, a stud carried thereby, a front roll supporting arm pivoted on said stud and sus;- tained against lateral movement by the bracket arm, and a return spring carried by said stud.

10. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets supported on said rail, each bracket having a forwardly extending arm, a stud carried thereby, a front roll supporting arm pivoted intermediate its end on said stud, a roll shaft carried by the front ends of said arms, and cam release means cooperating with the free ends of said arms 11. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets supported on the upper side of said rail, each bracket supporting a front feed roll arm, the rear ends of said arms extending downward through the rail, and cam release means located beneath the rail and engaging said rear ends.

12. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of b-rackets supported on said rail, front and rear feed roll supporting arms carried by said brackets, each arm having a free end, and cam release means cooperating with the free ends.

13. Paper feed mechanism for typewriting machines comprising a carriage rail, a

pair of brackets carried thereby, feed roll supporting arms pivoted on said brackets, a shaft carried by said brackets and cam release members carried by said shaft and cooperating with said arms.

14. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets carried thereby, feed roll supporting arms pivoted on said brackets, a shaft carried by said brackets, cam release means carried on said shaft, and cooperating with sai-d arms, one end of the shaft extending through the side plate of the carriage, and operating means associated with said extended ends.

15. Paper feed mechanism for typewriting machines comprising a carriage rail, a pair of brackets carried thereby, feed roll supporting arms pivoted on sai-d brackets and having free ends, all of said members being located above the carriage rail except the free. ends o said arms, a shaft carried by said brackets beneath the carriage rail, and cam release means 0n said shaft and engaging said free ends of the arms.

16. Paper feed mechanism for typewriting machines comprising a pair of brackets, feed roll supporting arms pivoted thereon and having free ends, a shaft located below said free ends of all of said arms, and cam means mounted on sai-d shaft and c0- operating with said free ends.

17. In paper feed mechanism for typewriting machines embodyin feed rolls carried by pivoted arms, a feed roll release means comprising a shaft, a member mounted on said shaft and having beveled grooves which receive and guide the free ends of said arms, and cam means within said grooves normally in substantial engagement with the free ends of said arms.

18. In pape-r feed mechanism for typewriting machines embodyin feed rolls carried by pivoted arms, a means comprising a shaft, means on said shaft provided with grooves which receive and guide the free ends of said arms, cam means within said grooves, and a beveled portion on the end of certain of said arms which is in engagement with the cooperating cams.

19. In paper feed mechanism for typewriting machines embodying feed rolls carried by pivoted arms, a feed roll release means comprising a shaft, gear means on the end thereof, a lever, a sector on said lever, and cooperating means on said gear means and sector to limit the movement of the lever in one direction.

20. In paper feed mechanism for typewriting machines embodying feed rolls car.- ried by pivoted arms, a feed roll release means comprising a shaft, gear means on the end thereof, a lever', a sector on said eed roll releasey lever, and cooperating flat portions on said gear means and Sai-d sector which come into engagement tolimit the movement of the lever in one direction.

21. Paper feed mechanism for typewriting machines comprising a carriage rail, feed rolls and their supports mounted entirely above the carriage rail and a cam release rod lmounted below the carriage rail having means for guiding and releasing the 10 fee-d rolls.

In testimony whereof We have hereunto subscribed our names.

EDWARD B. HESS. LEWIS G. MYERS. 

